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vfio_pci: Allow regions to add own capabilities

Browse source 
VFIO regions already support region capabilities with a limited set of
fields. However the subdriver might have to report to the userspace
additional bits.

This adds an add_capability() hook to vfio_pci_regops.

Signed-off-by: Alexey Kardashevskiy <[email protected]>
Acked-by: Alex Williamson <[email protected]>
Signed-off-by: Michael Ellerman <[email protected]>
This commit is contained in:
Alexey Kardashevskiy 2018-12-19 19:52:31 +11:00 • committed by Michael Ellerman
commit c2c0f1cde0
2 changed files with 9 additions and 0 deletions
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6
drivers/vfio/pci/vfio_pci.c
View file

@ -750,6 +750,12 @@ static long vfio_pci_ioctl(void *device_data,
if (ret)
return ret;
if (vdev->region[i].ops->add_capability) {
ret = vdev->region[i].ops->add_capability(vdev,
&vdev->region[i], &caps);
if (ret)
return ret;
}
}
}

3
drivers/vfio/pci/vfio_pci_private.h
View file

@ -62,6 +62,9 @@ struct vfio_pci_regops {
int (*mmap)(struct vfio_pci_device *vdev,
struct vfio_pci_region *region,
struct vm_area_struct *vma);
int (*add_capability)(struct vfio_pci_device *vdev,
struct vfio_pci_region *region,
struct vfio_info_cap *caps);
};
struct vfio_pci_region {